Notice: Undefined index: screenwidth in /var/www/htmlx/app/views/channels/index.phtml on line 3

Fatal error: Uncaught Error: Using $this when not in object context in /var/www/htmlx/app/views/channels/index.phtml:4 Stack trace: #0 {main} thrown in /var/www/htmlx/app/views/channels/index.phtml on line 4